Microwave test bench

Explain working of frequency meter and VSWR Meter in Microwave lab test bench.
How to check V-I char of klystron tube practically in lab on bench.
Please tell me.

JimB are you there.....


Regards
Sumer

JimB are you there.....

Click to expand...

Yes I am here.

Explain working of frequency meter and VSWR Meter in Microwave lab test bench.

Click to expand...

What sort of frequency meter?
What sort of VSWR meter?

How to check V-I char of klystron tube

Click to expand...

V-I Characteristics? not quite sure what you are looking for here.
Klystron! This in verging on Industrial Archeology!

JimB

frequency meter
vswr meter

microwave bench
I am talking about microwave bench with freq. meter and reflex klystron tube.

Well, the frquency meter is what is known as a Cavity Wavemeter, which is a type of absorbtion wavemeter.
A cavity is loosely coupled to the waveguide, and at the resonant frequency of the cavity, a small amount of power is sucked out of the waveguide and absorbed by the cavity. As the wavemeter is tuned across the frequency of the signal in the waveguide, a dip will be seen in the power indication at the far end of the waveguide.

The VSWR meter is used in conjunction with a "slotted line".
The slotted line has a probe which measures the electric field strength within the waveguide.
As the carriage of the slotted line is moved along the waveguide, peaks and troughs will be seen in the measured field strength (Assuming that the load is not perfectly matched).
Usually the VSWR is measured by first moving the slotted line carriage to find a peak voltage and then setting the meter on the VSWR indicator to full scale.
Then move the slotted line carriage to a trough in the voltage, then the VSWR can be read from the meter scale.

Have a look here to find all sorts of information about simple microwave test setups.

https://www.electro-tech-online.com/custompdfs/2013/02/exp1.pdf
https://www.electro-tech-online.com/custompdfs/2013/02/exp2.pdf
https://www.electro-tech-online.com/custompdfs/2013/02/exp3.pdf
https://www.electro-tech-online.com/custompdfs/2013/02/exp4.pdf
https://www.electro-tech-online.com/custompdfs/2013/02/exp5.pdf
https://www.electro-tech-online.com/custompdfs/2013/02/exp6.pdf

JimB

Thanks JimB
I knew only u can solve my problem.